Carbon roll and core for manifolding machines



Jul 24, 1928,

Filed Feb. 2'7, 1925 Qwuentoz,

Patented July 24, 1928.

UNITED STATES PATENT OFFICE.

LAWRENCE EDWARD LENTZ, OF HABRISIBURG, PENNSYLVANIA, ASSIGNOR TO ELLIOTT- FISHEIt COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE.

CARBON ROLL AND CORE FOR M ANIFOLDING MACHINES.

Application filed February 27, 1925. Serial No. 11,995.

My present invention relates to an improved carbon roll and core for manifolding machines.

The object of the invention is to'provide a manifolding machine with improved transfer mechanism including a novel arrangement of carbon roll, roll core and core mounting related in a manner to minimize the mutilation of the transfer element;

To the accomplishment of the general object stated the invention resides in the novel construction and arrangement hereinafter described, illustrated more or less diagrammatically in the accompanying drawings and defined in the appended claims.

In saiddrawings:

Figure 1 is a transverse section through:

the platen of a manifold machine, illustrating the general manner in which a mul-' tiple carbon roll is employed to supply sheets of carbon paper, interwoven with paper strips, to transfer to the underlying sheets matter printed or typewritten on the upper most sheet of paper.

Figure 2 is a perspective view of a carbon roll core equipped with both internal and external retaining means.

Figure 3 is a sectional view showing the relation of the spindle, core, roll, and guide flange.

In the drawings 1 indicates the flat platen of a manifolding machine, as, for instance, of the well=known Elliott-Fisher type, in which the printing mechanism is located over the platen and moves downward to print. At the opposite sides of this platen 1 are mounted spindles 2, which in this 'instance are square in cross-section to fit the squared axial openings or bores 3 of carbon roll cores 4, on one of which is wound a carbon roll 5' made up of one or more layers,

strips or webs of carbon paper led across the platen 1 in a. set or pile, from one roll to the other and interwoven or alternated with paper webs 6, disposed longitudinally of the platen and adapted to be fed endwise, independently of the carbon and in a direction at right angles thereto. The carbon webs are secured to the core by spring clamps 7 to prevent slippage of the carbon on the roll and as the carbon is unwound from the core it is guided by, circular guiding flanges 8 carried by .,thespindles 2 and adjustable thereon by means of set' screws 9 to accurate of the carbons in machines of this character.

One reason for this is that the constant feed- 1ng of the paper \vebs6 from the paper rolls and between thecarbon strips tends to mutilate the carbons by creating more or less slack therein which permits the carbon strips to wrinkle and finally break or tear. This character of carbon mutilation is effectively prevented by providing the core 4 with both internal and external retaining means; to wit, the squared bore fitted upon the squared spmdle serving to retain the core against slippage on the' spindle, and the clamps 7 serving to retain the carbon against slippage on the roll. This manner of mounting the carbon roll enables the webs to be held securely and thus prevents slacking and mutilationthereof by the paper webs as they are repeatedlydrawn forward to present fresh unused portions of the paper within the printing area of the machine.

Heretofore, it has been usual to mount a cylindrical core on a round spindle and to prevent slippage of the core by coupling it in some manner to the guide flanges. order to do this it has been necessary to extend the core slightly beyond the roll with the result that the flanges have been separated from the ends of the roll by an interval, which, while slight, has materially reduced'the efliciency of the flanges as guiding means for the carbon- The result has been more or less movement of the roll or of the individual webs which are not uided precisely as they must be for the e ective feeding of the paper webs without mutilation of the carbons. By providing a selfretaining core the necessity for its retention by the guide flanges is avoided and there is, therefore, no limitation placed upon the ac curate location of the guide flanges in their most eflective guiding positions. In fact, the core, as shown in Figure 3, may be of slight 1y less length than the roll so as to in no way limit or obstruct the adjustment of the By means of the construction and arrangement just described it is' apparent that I- avoid any slippage whatever which would tend to'slacken the carbon as the paper webs are fed forward, since the retention by internal retaining means prevents the slippage of the core on' the spindle and the external retaining means prevents slippage of the carbon on the core. I

What I claim is:

1. A carbon roll reel including, a rotatable shaft, a pair of flanges, and an intermediate sleeve, said flanges and sleeve being unconnected and splined to the-shaft to be directly driven thereby and relatively separable to extend the capacity of the reel inl'1 tgree limited only by the length of the s a 2. A carbon roll reel including, a rotatable shaft, a pair of flan es, an intermediate sleeve, said flanges an sleeve being unconnected and splined to the shaft to be directly driven thereby and relatively separable to extend the capacity of the reel in degree limited only by the length of the shaft, and a resilient member rotatable about the core to overlie one or more convolutions of carbon and clamp them to" the core. In testimony whereof I hereunto afiix my signature. j

LAWRENCE EDWARD'LENTZ. 

